EM solutions compact: ponds, swimming and koi ponds, German

The author, a former agricultural consultant who now works as a teacher and advisor on EM technology, has drawn on his years of experience with garden ponds, swimming ponds and swimming pools to provide pond builders and owners with a guide for constructing or cleaning their waters. Follow him through the world of water in the garden! Use the logic of EM (Effective Microorganisms) so that the pond or swimming pool in your garden can bring you even more pleasure.